speex编译
Posted mingfeng002
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首先去官网
https://www.speex.org/downloads/
下载解压
将include、libspeex文件夹复制到自己新建工程的jni目录下
speex有关的类
package com.speex.lib; public class Speex { /* quality * 1 : 4kbps (very noticeable artifacts, usually intelligible) * 2 : 6kbps (very noticeable artifacts, good intelligibility) * 4 : 8kbps (noticeable artifacts sometimes) * 6 : 11kpbs (artifacts usually only noticeable with headphones) * 8 : 15kbps (artifacts not usually noticeable) */ private static final int DEFAULT_COMPRESSION = 4; public Speex() { } public void init() { load(); open(DEFAULT_COMPRESSION); } private void load() { try { System.loadLibrary("speex"); } catch (Throwable e) { e.printStackTrace(); } } public native int open(int compression); public native int getFrameSize(); public native int decode(byte encoded[], short lin[], int size); public native int encode(short lin[], int offset, byte encoded[], int size); public native void close(); }
对应的C的源码speex_jni.cpp的源码
//// #include <jni.h> #include <string.h> #include <unistd.h> #include <speex/speex.h> static int codec_open = 0; static int dec_frame_size; static int enc_frame_size; static SpeexBits ebits, dbits; void *enc_state; void *dec_state; static JavaVM *gJavaVM; extern "C" JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_open (JNIEnv *env, jobject obj, jint compression) { int tmp; if (codec_open++ != 0) return (jint)0; speex_bits_init(&ebits); speex_bits_init(&dbits); enc_state = speex_encoder_init(&speex_nb_mode); dec_state = speex_decoder_init(&speex_nb_mode); tmp = compression; speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &tmp); speex_encoder_ctl(enc_state, SPEEX_GET_FRAME_SIZE, &enc_frame_size); speex_decoder_ctl(dec_state, SPEEX_GET_FRAME_SIZE, &dec_frame_size); return (jint)0; } extern "C" JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_encode (JNIEnv *env, jobject obj, jshortArray lin, jint offset, jbyteArray encoded, jint size) { jshort buffer[enc_frame_size]; jbyte output_buffer[enc_frame_size]; int nsamples = (size-1)/enc_frame_size + 1; int i, tot_bytes = 0; if (!codec_open) return 0; speex_bits_reset(&ebits); for (i = 0; i < nsamples; i++) { env->GetShortArrayRegion(lin, offset + i*enc_frame_size, enc_frame_size, buffer); speex_encode_int(enc_state, buffer, &ebits); } tot_bytes = speex_bits_write(&ebits, (char *)output_buffer, enc_frame_size); env->SetByteArrayRegion(encoded, 0, tot_bytes, output_buffer); return (jint)tot_bytes; } extern "C" JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_decode (JNIEnv *env, jobject obj, jbyteArray encoded, jshortArray lin, jint size) { jbyte buffer[dec_frame_size]; jshort output_buffer[dec_frame_size]; jsize encoded_length = size; if (!codec_open) return 0; env->GetByteArrayRegion(encoded, 0, encoded_length, buffer); speex_bits_read_from(&dbits, (char *)buffer, encoded_length); speex_decode_int(dec_state, &dbits, output_buffer); env->SetShortArrayRegion(lin, 0, dec_frame_size, output_buffer); return (jint)dec_frame_size; } extern "C" JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_getFrameSize (JNIEnv *env, jobject obj) { if (!codec_open) return 0; return (jint)enc_frame_size; } extern "C" JNIEXPORT void JNICALL Java_com_speex_lib_Speex_close (JNIEnv *env, jobject obj) { if (--codec_open != 0) return; speex_bits_destroy(&ebits); speex_bits_destroy(&dbits); speex_decoder_destroy(dec_state); speex_encoder_destroy(enc_state); }
在jni目录下新增android.mk文件,复制如下内容,Android.mk中记录了待编译的源文件的路
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := libspeex LOCAL_CFLAGS = -DFIXED_POINT -DUSE_KISS_FFT -DEXPORT="" -UHAVE_CONFIG_H LOCAL_C_INCLUDES := $(LOCAL_PATH)/include #LOCAL_SRC_FILES := LOCAL_SRC_FILES :=speex_jni.cpp \\ ./libspeex/bits.c \\ ./libspeex/cb_search.c \\ ./libspeex/exc_10_16_table.c \\ ./libspeex/exc_10_32_table.c \\ ./libspeex/exc_20_32_table.c \\ ./libspeex/exc_5_256_table.c \\ ./libspeex/exc_5_64_table.c \\ ./libspeex/exc_8_128_table.c \\ ./libspeex/filters.c \\ ./libspeex/gain_table_lbr.c \\ ./libspeex/gain_table.c \\ ./libspeex/hexc_10_32_table.c \\ ./libspeex/hexc_table.c \\ ./libspeex/high_lsp_tables.c \\ ./libspeex/kiss_fft.c \\ ./libspeex/kiss_fftr.c \\ ./libspeex/lpc.c \\ ./libspeex/lsp_tables_nb.c \\ ./libspeex/lsp.c \\ ./libspeex/ltp.c \\ ./libspeex/modes_wb.c \\ ./libspeex/modes.c \\ ./libspeex/nb_celp.c \\ ./libspeex/quant_lsp.c \\ ./libspeex/sb_celp.c \\ ./libspeex/smallft.c \\ ./libspeex/speex_callbacks.c \\ ./libspeex/speex_header.c \\ ./libspeex/speex.c \\ ./libspeex/stereo.c \\ ./libspeex/vbr.c \\ ./libspeex/vorbis_psy.c \\ ./libspeex/vq.c \\ ./libspeex/window.c \\ include $(BUILD_SHARED_LIBRARY)
在jni下创建Application.mk,并添加如下内容,编译所有平台下的so文件
APP_ABI := all
在jni/include/speex/目录下新增speex_config_types.h文件,复制内容如下
#ifndef __SPEEX_TYPES_H__ #define __SPEEX_TYPES_H__ typedef short spx_int16_t; typedef unsigned short spx_uint16_t; typedef int spx_int32_t; typedef unsigned int spx_uint32_t; #endif
在命令行输入ndk-build
开始编译
在libs目录下面生成
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